.root{
    font-size: 30px;
}

.black{
    display: inline-block;
    width: 100px;
    height: 100px;
    background: black;
    /*border: 1px solid #ccc;*/
    margin: -5px 0;
}
.white{
    display: inline-block;
    width: 100px;
    height: 100px;
    background: white;
    /*border: 1px solid #ccc;*/
    margin: -5px 0;
}